TribLIVE's Daily and Weekly email newsletters deliver the news you want and information you need, right to your inbox. For more than a century, many of Pittsburgh’s office buildings in the Golden Triangle have been kept warm using steam heat generated at a North Shore factory that is conveyed Downtown. But the Pittsburgh Allegheny County Thermal (PACT) system is old, failing and beyond repair, Mayor Bill Peduto said last year. A fix is in the works through an agreement the city inked last week with Clearway Community Energy, another North Side-based provider that’s a subsidiary of Clearway Energy Group, a San Francisco-based provider.